package org.wkg.lesson04;

public class Demo_406 {

    public static void main(String[] args) throws InterruptedException {
        Counter406 counter = new Counter406();
        Counter406 counter1 = new Counter406();
        //实例化了两个内容，由于是不同线程，即使increase方法加锁了，不会造成锁争抢

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter1.increase();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count : " + counter.count);
    }


}

class Counter406 {
    public static int count = 0;
    Object locker = new Object();

    public void increase() {
        synchronized (locker) {
            count++;
        }

    }

}


